By unchecking all the ghost options and changing their age? And then going in game and teleporting them back to the home.

That's not a good idea.

Most of the dead that still has there full data are corrupted.

Meet me at the river has fixed most of them but I would still not resurrect them.

Believe me I did all the work to make them usable again and it took a long time.

Now if you want to play all the ancestors then just get my Beginning Hoods and have fun with good clean none corrupted sims. http://modthesims.info/member.php?u=7749491

I wasn't thinking about the ancestors but a pair of sims that I created and that just recently died. I was wanting to redo part of their story. Do player-created sims get corrupted when they die?
I suppose I could use sim surgery to recreate them but I really want them to keep their memories.

Player-created sims should be fine to resurrect, but you should do it using the resurrect-o-nomitron in-game. If you don't have anyone related to the sims who died, Cyjon has a special resurrect-o-nomitron which will resurrect any sim who is buried on the lot, regardless of whether anyone knew them.

Cyjon's Resurrect-O-Nomitron Mk 2 can be found here:

http://www.cyjon.net/node/115

Thanks to all of you. I'll give that a try.